The Commonwealth Games Association web site reports:
"The IX Games from the 16th to the 25th of July, 1970 in Edinburgh will be remembered for a number of firsts. It was the first time that metric distances and electronic photo-finish technology were employed at the Games and also the first time that HM Queen Elizabeth II attended in her capacity as Head of the Commonwealth.
"Scots will further remember the Games for the two Scottish brothers who won gold, one on the first day and one on the last."
Forty-two nations sent a total of nearly 1,750 athletes and officials to the first Edinburgh Games. New medal winning nations included Tanzania, Malawi and St Vincent.
Ten sports were featured in the Games: athletics, badminton, boxing, cycling, fencing, lawn bowls, shooting, swimming and diving, weightlifting and wrestling.